In 1045 during the song dynasty a man by the name bi shing invented?

your answer is c

explanation:

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.

it allows shippers to carry commercial goods, which allows them to save time and money.

athena gives perseus a mirror sp he won't directly look back at her.